AUTOMATION OF NUTRIENT REQUIREMENT IN HYDROPONIC SYSTEM FOR STEVIA CROP CULTIVATION

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Date
2023-05-19
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ACHARYA NG RANGA AGRICULTURAL UNIVERSITY
Abstract
Soil is the most important component for plant growth that supports plant roots, supplies water, air and nutrients. However, soil do impose severe constraints like unsuitable soil conditions, unfavorable soil compaction, poor drainage, soil borne diseases, and room for disease causing microorganisms. Growing land, water and labour are other constrains in urban metropolitan areas. Hence, these conditions are directing us soil less culture for growing crops in small- and large-scale production. The present study was proposed to design automated nutrient regulation in hydroponics environment with automatic nutrient feed technology at Dr. NTR College of Agricultural Engineering, Bapatla. The automated nutrient regulation system for pH and TDS of nutrition water in the hydroponic greenhouse prototype consists of a combination of hardware and software. The hardware design consists of a water temperature sensor, air temperature cum humidity sensor, pH sensor, and TDS nutrition sensor combined with Arduino Uno software connected to four solenoid valves. These valves function to control the water, nutrient solution (TDS), pH-up and down. To set up a hydroponic control and monitoring system, TDS sensor and pH sensor were installed in the nutrient water reservoir. Two reservoirs of 20-Liter capacity for water and nutrient solutions and other two small reservoirs (2 Lit) for pH-up and pH-down solutions were fabricated and connected to nutrient reservoir tank. TDS and pH values of nutrient solution were recorded by using TDS and pH sensor probes respectively. Recorded TDS and pH values were fed to Arduino which adjusts the values, if required, through actuators. The components of the automated nutrient regulation system included GSM module, LCD display, Arduino Uno, sensors. In this study, the sensors are connected to Arduino-Uno controller in which liquid crystal display (LCD) of Arduino-Uno circuit controls and regulates the system based on the developed program. Pre and post calibration was done for all the parameters. TDS and pH values of nutrient solution were sensed by TDS and xiv pH sensor probes sends to Arduino which adjusts the parameter values, if required, through actuators and solenoidal valves. Daily monitored data of relative humidity, Air temperature, Water temperature in the hydroponic system in the closed poly-house controlled environment were recorded with Stevia crop cultivation. The results of the study revealed that the model was also able to monitor and control nutrition plant water according to the requirements of pH (6.1-6.2) and TDS (710-720 ppm) values. The ANR system responded immediately with the change of pH an TDS values released corresponding solutions to bring the nutrient parameters to target range. The better performance of the crop parameters of stevia was achieved under ANR system due to better nutrient regulation. There was no significant difference between ANR system and manual system in case of no. of branches and root length. There was significant difference between ANR system and manual system in case of number leaves and plant height. Healthy plant growth was achieved with ANR system with yield of 0.064 kg higher compared to manual hydroponic system for 200 plants. Keywords: Automated hydroponic system, pH, TDS, Arduino Uno, Solenoid valves, Hydroponics, Sensors, Stevia
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AUTOMATION OF NUTRIENT REQUIREMENT IN HYDROPONIC SYSTEM FOR STEVIA CROP CULTIVATION
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